profile: scope Contests tab to its own host endpoint (#14262)

## Summary
- Replaces the profile Contests tab's global-list-then-filter approach
with a single call to the new server-scoped endpoint `GET
/v1/users/{id}/contests` (SDK: `sdk.users.getContestsByUser`).
- Adds `useUserRemixContests` in `@audius/common` with the same
prime-on-fetch flow (`primeRelatedData`, event cache, useRemixes
entry-counts) as `useAllRemixContests`, so ContestCard stays a
synchronous cache hit.
- Removes the `MAX_PAGES_TO_LOAD` auto-pagination workaround and per-row
`HostedContestCard` host-guard that existed because the old endpoint
couldn't filter by host. Updates desktop, mobile-web, and React Native
consumers.
- SDK regen pulls in the new endpoint definition.

Pairs with
[audius/api#790](AudiusProject/api#790) which
adds the underlying endpoint + swagger entry.

## Test plan
- [ ] Visit a profile that hosts contests, switch to the Contests tab —
list renders without first paging through unrelated contests
- [ ] Visit a profile that has only ended contests — they appear (the
old workaround pulled up to 5 pages of the global list to surface these)
- [ ] Visit a profile that has hosted no contests — empty state renders
- [ ] Active-then-ended ordering preserved
- [ ] Confirm same behavior on mobile-web and React Native profile
screens

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: dylanjeffers

packages/common/src/api/tan-query/events/index.ts

@@ -1,6 +1,7 @@
 // Queries
 export * from './useAllEvents'
 export * from './useAllRemixContests'
+export * from './useUserRemixContests'
 export * from './useEvent'
 export * from './useEventFollowers'
 export * from './useEvents'

packages/common/src/api/tan-query/events/useUserRemixContests.ts

@@ -28,9 +28,9 @@ type UseUserRemixContestsArgs = {
   userId: ID | null | undefined
   pageSize?: number
   /**
-   * Filter by contest status. Defaults to `'all'` (the backend's default),
-   * which returns active contests first (ordered by soonest-ending end_date)
-   * followed by ended contests (most-recently-ended first).
+   * Filter by contest status. Defaults to `'all'`, which returns active
+   * contests first (ordered by soonest-ending end_date) followed by ended
+   * contests (most-recently-ended first).
    */
   status?: UserRemixContestStatus
 }
@@ -41,20 +41,21 @@ export const getUserRemixContestsQueryKey = ({
   status = GetContestsByUserStatusEnum.All
 }: UseUserRemixContestsArgs) =>
   [
-    QUERY_KEYS.userRemixContests,
-    { userId, pageSize, status }
+    QUERY_KEYS.userRemixContestsList,
+    userId,
+    { pageSize, status }
   ] as unknown as QueryKey<ID[]>
 
 /**
- * Hook to fetch remix contest events hosted by a specific user with infinite
- * query support. Calls the dedicated endpoint
- * `GET /v1/users/{id}/contests` (SDK: `users.getContestsByUser`), which returns
- * events ordered with currently-active contests first (by soonest-ending
- * end_date) followed by ended contests.
+ * Hook to fetch the remix contests hosted by a specific user with infinite
+ * query support. Calls `GET /v1/users/{id}/contests` (SDK:
+ * `users.getContestsByUser`), which returns events ordered with
+ * currently-active contests first (by soonest-ending end_date) followed by
+ * ended contests.
  *
- * Each page is mapped to the remix contest's parent track ID
- * (`event.entityId`) so consumers like `ContestCard` can receive a
- * `trackId` prop and resolve the event internally via `useRemixContest`.
+ * Each page is mapped to the contest's parent track ID (`event.entityId`)
+ * so consumers like `ContestCard` can take a `trackId` prop and resolve the
+ * event internally via `useRemixContest`.
  */
 export const useUserRemixContests = (
   {
@@ -75,22 +76,24 @@ export const useUserRemixContests = (
       return allPages.length * pageSize
     },
     queryFn: async ({ pageParam }) => {
+      if (!userId) return []
       const sdk = await audiusSdk()
       const { data, related } = await sdk.users.getContestsByUser({
         id: Id.parse(userId),
         limit: pageSize,
-        offset: pageParam as number,
+        offset: pageParam,
         status
       })
 
       // Prime related tracks + users (full objects, delivered alongside the
-      // event list on the per-user endpoint, same shape as the discovery
-      // endpoint).
+      // event list). This turns ContestCard's useTrack / useUser into cache
+      // hits so the grid can paint with one network round-trip instead of
+      // N+1.
       primeRelatedData({ related, queryClient })
 
       // Prime useRemixes({ trackId, pageSize: 0, isContestEntry: true }) so
       // ContestCard's entry-count badge doesn't fire a count-only request
-      // per card.
+      // per card. Mirrors the priming in useAllRemixContests.
       const entryCounts = related?.entryCounts ?? {}
       for (const [hashedTrackId, count] of Object.entries(entryCounts)) {
         const trackId = OptionalHashId.parse(hashedTrackId)
@@ -114,7 +117,7 @@ export const useUserRemixContests = (
         .map((sdkEvent: SDKEvent) => {
           const event = eventMetadataFromSDK(sdkEvent)
           if (!event) return null
-          // Prime the per-event cache so useEvent hits immediately downstream.
+          // Prime per-event cache so useEvent hits immediately downstream.
           queryClient.setQueryData(getEventQueryKey(event.eventId), event)
           // useRemixContest resolves via useEventIdsByEntityId keyed by
           // (entityId, entityType=Track, eventType=RemixContest). Prime that
@@ -136,8 +139,8 @@ export const useUserRemixContests = (
         })
         .filter(removeNullable)
     },
-    enabled: !!userId && options?.enabled !== false,
     select: (data) => data.pages.flat(),
+    enabled: options?.enabled !== false && !!userId,
     ...options
   })
 }

packages/common/src/api/tan-query/queryKeys.ts

@@ -99,7 +99,7 @@ export const QUERY_KEYS = {
   events: 'events',
   eventsByEntityId: 'eventsByEntityId',
   remixContestsList: 'remixContestsList',
-  userRemixContests: 'userRemixContests',
+  userRemixContestsList: 'userRemixContestsList',
   walletOwner: 'walletOwner',
   tokenPrice: 'tokenPrice',
   usdcBalance: 'usdcBalance',

packages/mobile/src/screens/profile-screen/ProfileTabs/ContestsTab.tsx

@@ -1,15 +1,5 @@
-import { useEffect, useMemo } from 'react'
-
-import {
-  getEventIdsByEntityIdQueryKey,
-  getEventQueryKey,
-  useAllRemixContests,
-  useProfileUser
-} from '@audius/common/api'
-import type { Event, ID } from '@audius/common/models'
-import { EventEntityTypeEnum, EventEventTypeEnum } from '@audius/sdk'
+import { useProfileUser, useUserRemixContests } from '@audius/common/api'
 import { useIsFocused } from '@react-navigation/native'
-import { useQueryClient } from '@tanstack/react-query'
 import { View } from 'react-native'
 
 import { Box, Flex, LoadingSpinner } from '@audius/harmony-native'
@@ -28,85 +18,29 @@ import { EmptyProfileTile } from '../EmptyProfileTile'
  * integrates with the parent `CollapsibleTabNavigator`'s scroll-tracking
  * — a regular `ScrollView` here breaks the collapsible header behaviour.
  *
- * Filtering by host:
- * The discovery `getRemixContests` endpoint doesn't yet support filtering
- * by host userId, so we paginate the global list and filter
- * client-side. We do the filter at the parent level by reading the
- * already-primed event from React Query's cache (useAllRemixContests
- * primes each event via `queryClient.setQueryData`). This avoids
- * per-row `useRemixContest` calls (which can race when multiple cards
- * mount at once) and gives a single deterministic list of trackIds to
- * render.
- *
- * Auto-paginates: we proactively fetch all pages until exhausted so the
- * tab is reliable for hosts whose contests sit beyond the first page of
- * the global list — `onEndReached` alone wouldn't fire for users with
- * just one or two visible cards (no scroll needed).
+ * Backed by `GET /v1/users/{id}/contests` (active first by soonest end,
+ * then ended) so the tab no longer needs to walk the global list and
+ * filter client-side.
  */
 export const ContestsTab = () => {
   const { user_id: hostUserId } =
     useProfileUser({
       select: (user) => ({ user_id: user.user_id })
     }).user ?? {}
   const isFocused = useIsFocused()
-  const queryClient = useQueryClient()
-
-  // Larger page size + auto-pagination below: the discovery endpoint
-  // doesn't support `host=…`, so we paginate the global list and
-  // filter client-side. Bumped from 50 → 100 because hosts whose
-  // contests sit deep in the global list (ended contests, smaller
-  // accounts) were missing from the tab — Julian's @dimensionx
-  // report. Together with the `useEffect` below that drains pages
-  // until exhausted, this guarantees the host's contests appear once
-  // they're anywhere in the result set.
-  const {
-    data: trackIds,
-    isPending,
-    isFetching,
-    hasNextPage,
-    fetchNextPage,
-    isFetchingNextPage
-  } = useAllRemixContests({ pageSize: 100 }, { enabled: isFocused })
 
-  const allTrackIds = useMemo(() => trackIds ?? [], [trackIds])
-
-  // Filter to contests hosted by THIS profile by reading each contest's
-  // event from the cache (primed by useAllRemixContests). Re-derives on
-  // every render so newly-arrived pages flow in immediately.
-  const contestTrackIds = useMemo(() => {
-    if (hostUserId === undefined) return []
-    return allTrackIds.filter((trackId) => {
-      const eventIds = queryClient.getQueryData<ID[]>(
-        getEventIdsByEntityIdQueryKey({
-          entityId: trackId,
-          entityType: EventEntityTypeEnum.Track,
-          eventType: EventEventTypeEnum.RemixContest
-        })
-      )
-      const eventId = eventIds?.[0]
-      if (!eventId) return false
-      const event = queryClient.getQueryData<Event>(getEventQueryKey(eventId))
-      return event?.userId === hostUserId
-    })
-  }, [allTrackIds, hostUserId, queryClient])
+  const { data: trackIds, isPending } = useUserRemixContests(
+    { userId: hostUserId, pageSize: 50 },
+    { enabled: isFocused && !!hostUserId }
+  )
 
-  // Auto-fetch subsequent pages until exhausted — see hook docstring.
-  // The host's contests can sit anywhere in the global list, so a single
-  // page isn't enough to guarantee we've seen them all.
-  useEffect(() => {
-    if (hasNextPage && !isFetchingNextPage && isFocused) {
-      fetchNextPage()
-    }
-  }, [hasNextPage, isFetchingNextPage, isFocused, fetchNextPage])
+  const contestTrackIds = trackIds ?? []
 
   if (!hostUserId) {
     return null
   }
 
-  if (
-    (isPending || isFetchingNextPage || hasNextPage) &&
-    contestTrackIds.length === 0
-  ) {
+  if (isPending) {
     return (
       <Flex justifyContent='center' style={{ marginTop: spacing(6) }}>
         <Box style={{ width: 24 }}>
@@ -116,7 +50,7 @@ export const ContestsTab = () => {
     )
   }
 
-  if (!isFetching && contestTrackIds.length === 0) {
+  if (contestTrackIds.length === 0) {
     return <EmptyProfileTile tab='contests' />
   }